Mirror Lake drains into Winnipesaukee at the site of Ernie Piper's former gas station/post office/general store.
There are Lake Winnipesaukee shallows right there enjoyed by rafters, and one especially large condominium complex. That complex occupies the former site of a huge marina/dealership known as "Winnipesaukee Motor Craft", which my Dad always referred to as "Winnipesaukee Motor
Crafty".
Where Mirror Lake drains into Lake Winnipesaukee is shallow and filled with the same water plants as Mirror Lake. From route 109, you can see the Mirror Lake creek where it parallels the turnoff to Tuftonboro Neck Road on its southern side. (Left side of both roads, going north on 109). The summer flow is on-and-off, depending on rainfall. Last night's rain will have already increased its flow into the Big Lake.
This may be especially bad news for residents of "The Basin", who already had water quality issues.
Wolfeboro has future plans to draw water from Lake Winnipesaukee, as its present pond supply is unable to keep up with demand and is losing its former good quality.
The poison produced by the bacteria is quite potent, so I'm not sure I'd want to be in the area where a kettle of that water is being heated and aerosolized. PWCs driving over mats of
cyanobacteria in other states have passed out unconcious.
Mirror Lake is posted "No Swimming", and the state recommends not to even shower with the lake water, or allow animals to drink of it.
(I think red squirrels are exempt from that last one.
)